The Injen Mk7 is a relatively low cost open intake that provides an opportunity to test a different style intake. It’s a basic filter on a stick with a simple partition.
The inlet pipe is constructed of metal, a departure from my usual setup that uses silicone or the stock plastic accordion, thus presenting the opportunity to see how badly this metal pipe retains heat to cook the intake air, or so the theory goes.
The kit is supplied with a silicone reducer to connect the inlet pipe to the stock size turbo elbow. As an excursion of this test I obtained a straight 3″ silicone coupler so that I can attach the Injen intake directly to the MST turbo inlet elbow.
Flow testing the intake begins with a calibration check of the flow bench followed by attaching the intake to the bench using an adapter that simulates the entry to the IS20/IS38 turbocharger.
A generic turbo inlet pipe with a stock size inlet is used to join the Injen pipe to the bench adapter. The bench is operated at a depression of 28″ of H2O and the airflow reading at that pressure drop is recorded.
The generic inlet elbow is then replaced by the MST inlet elbow and the straight silicone coupler is used to attach the Injen intake pipe to the elbow.
The remainder of the test is the same a described above.
Airflow readings for the two test cases are shown on the next chart. The as delivered product flowed 392 CFM and the swap to the 3″ straight coupler and MST TIP resulted in 396 CFM being flowed.
These results compared with other intakes under similar conditions are shown below.
The Injen Mk7 intake flows 392 CFM with a stock diameter TIP and 396 CFM with a 3″ turbo inlet pipe, this is comparable to other open intakes and ranks in the top quarter of all the intake systems that have been flow tested.